Infineon Technologies CY7C1041CV33-10BAXA

Overview

CY7C1041CV33-10BAXA from Cypress Semiconductor is an automotive-grade 4-Mbit (256 K × 16) CMOS static RAM with 10 ns access time, TTL-compatible I/O, and dual-byte write control (BHE/BLE). It operates across –40 °C to +125 °C (Automotive-E grade), supports automatic CE power-down (ISB2 ≤ 15 mA), and is packaged in a 44-pin 400-mil SOJ. It serves as main data buffer in engine control units requiring deterministic low-latency memory access.

For engineers reviewing the CY7C1041CV33-10BAXA datasheet, CY7C1041CV33-10BAXA pinout, CY7C1041CV33-10BAXA application, or CY7C1041CV33-10BAXA equivalent, key selection criteria include tAA = 10 ns read timing, byte-selectable 16-bit I/O architecture, CE/OE/WE/BHE/BLE control logic compatibility, and Automotive-E temperature qualification.

Technical Context

This SRAM implements a synchronous, non-volatile-accessible 262,144 × 16-bit array with fully decoded row/column addressing via A0–A17. Read and write operations are controlled by active-low CE, OE, WE, BHE, and BLE signals, enabling independent high- and low-byte writes without external gating logic.

It features automatic power-down when CE is HIGH (ISB2 ≤ 15 mA at VCC = 3.3 V, f = 0), TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and bidirectional I/O pins (I/O0–I/O15) that enter high-impedance state during deselect, output disable, or write cycles - eliminating need for external bus transceivers.

Key Specifications

Pinout & Package

Package: 44-pin 400-mil SOJ (Small Outline J-Lead), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SRAM applications.

Compared with IS61WV25616EDBLL-10MLI and AS6C4008-10TIN, CY7C1041CV33-10BAXA uniquely delivers 10 ns access time with full Automotive-E qualification and lowest standby current (15 µA), making it the sole choice for thermally demanding, safety-critical engine and transmission control nodes.

Availability

CY7C1041CV33-10BAXA is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and ADAS camera ECUs requiring stable component supply under extended temperature and automotive lifecycle constraints.

Supply support for CY7C1041CV33-10BAXA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability memory and programmable solutions for automotive, industrial, and IoT applications, with global manufacturing and AEC-Q100 validation infrastructure.

CY7C1041CV33 belongs to Cypress's automotive SRAM product line, engineered specifically for real-time control subsystems requiring deterministic timing, extended temperature resilience, and zero-refresh operation in safety-critical ECUs.

FAQ

Is CY7C1041CV33-10BAXA pin-compatible with CY7C1041BNV33?

Yes - the datasheet explicitly states "Pin and function compatible with CY7C1041BNV33". Both share identical 44-pin SOJ pinout, address/data/control signal mapping, and electrical interface behavior, enabling drop-in replacement in existing designs without layout changes.

What is the maximum clock frequency supported for read/write cycles?

The device does not use a clock; it is asynchronous. Maximum effective throughput is determined by tRC = 10 ns (read cycle time), supporting up to 100 MHz sustained random access on a parallel bus - assuming controller meets all setup/hold timing requirements per the truth table on page 11.

Does CY7C1041CV33-10BAXA require external refresh circuitry?

No - it is a static RAM (SRAM), not DRAM. Data retention is indefinite as long as VCC remains within specification and CE is asserted during active use. No refresh cycles, timers, or external circuitry are needed, simplifying system design and reducing firmware overhead.

Can I/O pins be used as pure inputs during write operations?

Yes - during any write cycle (CE = LOW, WE = LOW), all I/O0–I/O15 pins are automatically placed in high-impedance input mode regardless of BHE/BLE state. This prevents bus contention and eliminates need for external tri-state control logic.